Knob equipped door handle construction



April 8, 1952 P. s. WINN KNOB EQUIPPED DOOR HANDLE CONSTRUCTION Filed July 11, 1943 Philip 5. Winn JNVENTOR.

9 BY @Awamiam mdfiwuyfiML Patented Apr. 8, 1952 UNITED STATES TENT OFFICE KNOB EQUIPPED DOOR HANDLE CONSTRUCTION The present invention relates to certain new and useful improvements in a conventional-type knob equipped door handle construction and has more particular reference to an added feature which takes the form of a safety guard in that it shields and prevents the customarily employed assembling and fastening screw from becoming accidentally or otherwise displaced.

An ordinary door knob assembly or construetion comprises, as is Well known, two comp1emental knobs, one for inside use and the other for outside use, the two knobs being mounted on a square spindle which is inserted through and installed in a mortise-type lock. One knob is integral with the stated spindle and the latter has indentations or holes to accommodate a fastening screw which serves to detachably mount the remaining knob on the remaining end of said spindle. The screw, usually identified as a set-screw, passes through the shank or hub portion of the detachable knob and is attached by way of screw holes to the spindle. The kerfed end of the set-screw is usually exposed through the stated shank and is likely to become loose and eventually be displaced.

The purpose of the present invention is to provide a simple and practical safety guard which is carried by the aforementioned detachable knob and which functions to cover the set-screw in a manner to prevent it from becoming displaced.

More specifically, the invention has to do with a simple flanged sleeve which rotatably encloses the shank, is latched in place at one end by appropriate detent means and is assembled and held in place at an opposite end by a simple washer, said sleeve having an access hole which may be lined up with the set-screw while latter is being inserted and set in place, and then shifted out of alignment therewith to guard against subsequent displacement of said setscrew.

Other objects and advantages will become more readily apparent from the following description and the accompanying illustrative drawings.

In the accompanying sheet of drawings, wherein like numerals are employed to designate like parts throughout the views:

Figure 1 is an elevational View of a knob equipped door handle construction provided with my improved screw-guard;

Fig. 2 is a group perspective view showing the two knob units;

Fig. 3 is a perspective view of the screw-guard per se;

Fig. 4 is a fragmentary view, with parts in section and elevation, illustrating the details and their construction and mechanical association; and,

Fig. 5 is a cross-section on the line 5-5 of Fig. 4, looking in the direction of the arrows.

Referring now to Fig. 1, one of the stated units is denoted by the numeral 1 and comprises a knob 8, hub-shank 9 and spindle l0 connected and extending axially from said shank 9. The spindle is of usual polygonal cross-sectional form and provided with a plurality of longitudinally spaced selectively usable screw holes I I.

The complemental knob unit is denoted by the numeral l2 and comprises a knob l3 provided with a hub-shank [4 which latter has an axial socket of polygonal cross-sectional form to accommodate and key the spindle-end which telescopes into the socket, as shown in Fig. 4. The set-screw here seen is denoted by the numeral l5 and extends through screw-threaded holes provided therefor in the shank and also through a selected one of the aforementioned screwholes H.

The screw-guard is in the form of an attachment which as shown in Fig. 3 comprises a cylindrical sleeve I6 having a screw access hole H at a predetermined point. At one end the sleeve is provided with an outstanding circular assembling and latching flange l8 provided in one face with depressions l9 and 20 providing selectively usable keeper seats. The sleeve is fitted over the shank [4 (see Fig. 4) and the flanged end is fitted rotatably into a recess 2| provided therefor in the complemental face of the knob I 3. The knob has a socket 22 to accommodate an expansion-type coiled spring which acts on a ball detent 24 which latter constitutes a latch and is projectable into the keeper seats l9 and 20, in an obvious manner. The sleeve is assembled in place and permitted rotation by an assembling washer 25 which is secured by screws 26 to the left hand end of shank Hi. The washer 25 is of a diameter greater than the shank l4 and of the same outside diameter as the outside diameter of the sleeve 16 to provide the flush arrangement shown in the drawings. Thus, we have a guard sleeve with a single aperture l1 rotatably mounted on the shank l4 and held in place by a washer 25 carried by the shank, the flange IB fitting into a recess'2l for proper coaction with the spring pressed ball detent 24.

When the screw II is being inserted to assemble the knob unit [2 on the spindle ID, the

access hole is properly lined up with the screw, that is, the end of the screw which has the usual screw driver kerf therein. Perhaps it is best to identify the latter end of the screw by the numeral 21 in Fig. 4. While making this insertion the ball detent 24- would of course be seated in the keeper seat [9. After the unit [2 has been properly assembled and fastened by the set-screw, the sleeve is grasped and turned by hand approximately one-half turn either right or left. This then, allows the ball detent to snap into the keeper seat 20 as shown in Fig. 4. It will be noted in this connection that the access hole I! lines up with the keeper seat 20 and when the sleeve is turned so that the hole I! is at the bottom, the end 21 of the set-screw is guarded and held against accidental displacement.

Changes in shape, size, materials and rearrangement of details and parts may be resorted to in actual practice, so long as they do not depart from the spirit of the invention or the scope of the appended claims, as is well understood.

Having described the invention, what is claimed as new is:

1. As a new article of manufacture, a knob having a reduced integral centrally disposed shank on one side, said shank being elongated and having a screw accommodating hole, a washer abutting and detachably fixed on the inward end of said shank, said washer being of a diameter greater than the outside diameter of said shank and serving as an abutment and retaining memher, said knob having an annular recess surrounding the inward end of said shank, an elongated rotary sleeve surrounding the shank between the washer and knob and having an outstanding fiange at its outward end fitting rotatably in said recess, said sleeve having a single hole registrable with said screw accommodating hole.

2. The structure specified in claim 1 wherein said knob is provided with a spring pressed ball detent registrable with said recess and wherein said flange is provided with diametrically opposite keeper seats for selective reception of said detent.

PHILIP S. WINN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 430,145 Peck June 17, 1890 943,740 Fletcher Dec. 21, 1909 1,384,397 "Miller July 12, 1921 1,967,152 Lyons July 17, 1934 2,505,852 Budnick et a1. May 2, 1950 FOREIGN PATENTS Number Country Date 2,956 Great Britain Mar. 6, 1885 

